Grepo families are Croats and they are mostly from Imotski area. In the past century, relatively most of Croatian residents bearing this family name were born in Imotski area and in Osijek.
Prevalence
About 160 people with faimily name Grepo live in Croatia today, in 70 households. There were 140 of them in the middle of the past century, and their number increased by 20 percent. They are located in 9 Croatian counties, in 15 cities and 19 other places, mostly in Split (30), Visnjevac (20), Makarska (20), Osijek (20), and in Runovic in Imotski area (15).
Outside Croatia
Family name Grepo is present in 15 countries worldwide. The family name "Grepo " is used by some 200 people in the United States.
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 2007 in source Encyclopaedia of Croatian Surnames.